Re: [PATCH] improved boot time TSC synchronization

From: David Mosberger (
Date: Thu Jan 16 2003 - 12:54:37 EST

>>>>> On Thu, 16 Jan 2003 11:44:55 -0500, Jim Houston <> said:

  Jim> The current TSC synchronization may have an error on the order
  Jim> of 1 microsecond on a quad processor system. Not a big deal
  Jim> but annoying if you are trying to figure out what order things
  Jim> happen based on TSC time stamps.

  Jim> Since the IA64 folk already solved this problem, I did a quick
  Jim> hack based on the itc sync code.

Cool. I'm glad to see the code is proving useful on other architectures.
I was hoping that would be the case.

BTW: The algorithm is documented in Section 8.5.2 of my book (see If there is enough interested, I'd be
willing to try to talk the publisher into releasing that section as a
PDF (or perhaps HTML).

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Thu Jan 23 2003 - 22:00:13 EST